African foam-nest tree frog (Chiromantis rufescens) is an interesting frog. It is from the family Rhacophoridae, commonly called the mossy frog family. They are native to central Africa.
These frogs are called foam frogs because they can make a foamy material when rubbing their hands. The female lays her eggs into the nest that is formed from the foam. The nest overhangs water. After she is done laying her eggs, she leaves the nest and the males come in and fertilize the eggs. The eggs grow in the nest until they get big enough where they fall into the water underneath them.